void test_T3(Tensor1<double,3> &t1_1, const Tensor1<double,3> &t1_2,
             Tensor2<double,3,3> &t2_1, const Tensor2<double,3,3> &t2_2,
             const Tensor2<double,3,3> &t2_3,
             const Tensor2_symmetric<double,3> &t2s_2,
             const Tensor2_symmetric<double,3> &t2s_3,
             Tensor3_dg<double,3,3> &t3dg_1,
             const Tensor3_dg<double,3,3> &t3dg_2);
